Pedal to metal: There will be no need for police radar on a section of the Stuart Highway when speed limits are abolished in two weeks' time at the start of a six-month trial.

Northern Territory Police

Peak medical organisations have united to call on the Northern Territory Government to abandon its trial of abolishing speed limits.

The six-month trial on a 200 kilometre stretch of the Stuart Highway between Alice Springs and Barrow Creek starts on February 1.

Territory representatives of the the College of Physicians, the Australian Medical Association, the College of Surgeons and the College for Emergency Medicine argue the trial is irresponsible and dangerous.

Territory chair of the College of Physicians, Dr Christine Connors, says the Government is ignoring all medical evidence about the impact of speed.

She says the trial will claim lives.

"'It is just a disaster that is waiting is happening," she said.

"The problem is the disaster is going to be more families of the Territory losing family members."

Dr Connors says the Government is ignoring all medical evidence about traumas caused by high-speed crashes.

"If they have decided deliberately to allow open speeds, against all of the evidence and against all of the trends internationally, they would have to take responsibility for deaths," she said.

Chief Minister Adam Giles rejects the claims.

He says the main cause of road deaths is alcohol.

"If these people ... are interested in what is happening on our roads, want to be serious, they want to start talking about people who drink, and drive and don't wear seat belts," he said.

"They are the two things that kill people, not speed.

"You can go through any statistics between 2001 and today, and you will see [it is] drink-driving and no seat belts that kill people.

"If you want to see a serious change on our roads get people to stop drink-driving."

Mr Giles defends the open speeds trial as a move away from the "nanny state".

He says abolishing speed limits do not encourage people to speed but allows them to drive to their ability.

"The invitation is to invite people to drive responsibly to the conditions of the road, to the conditions, the environment, to their car and their driving ability," he said.

"We are putting the onus back people and removing parts of the nanny state to say drive responsibly.

"We are not asking or telling people to drive fast; this about asking people to drive to their ability."

The current top speed limit on some Territory roads and highways is 130km/h.

Open speeds were abolished by the then Labor government in 2007.

Last year, Transport Minister Peter Styles said there had been no recent deaths linked to speed on the section of the Stuart Highway chosen for the trial.

The two-lane section is undivided.

When current Chief Minister Adam Giles was Opposition transport spokesman in 2009, he called the imposition of speed limits "politically motivated".

When the unlimited speed trial was first announced in October last year, it was greeted with a chorus of disapproval and protests from motoring organisations, safety bodies, medical professionals and even the Northern Territory Police Association.

Among the most vocal was Pedestrian Council of Australia chairman Harold Scruby.

"This Government will have blood on its hands," he said.

"You are going to invite every hoon in Australia to come up there and test their cars on this road."